USSR (Union of Soviet Socialist Republics) cannot be provided as a medical definition, as it is not a medical term; it refers to a former political state that existed from 1922 until 1991 and was dissolved into multiple independent countries.

The study of natural phenomena by observation, measurement, and experimentation.

"In the context of medicine, 'History' refers to the detailed narrative account of a patient's past and present health conditions, symptoms, treatments, lifestyle, and other relevant information, obtained through interviewing the patient or their significant others."

Pollutants, present in soil, which exhibit radioactivity.

Philosophic formulations which are basic to psychoanalysis. Some of the conceptual theories developed were of the libido, repression, regression, transference, id, ego, superego, Oedipus Complex, etc.

The type species of the genus INFLUENZAVIRUS A that causes influenza and other diseases in humans and animals. Antigenic variation occurs frequently between strains, allowing classification into subtypes and variants. Transmission is usually by aerosol (human and most non-aquatic hosts) or waterborne (ducks). Infected birds shed the virus in their saliva, nasal secretions, and feces.

I'm sorry for any confusion, but "Kazakhstan" is not a medical term and does not have a medical definition; it is the name of a country located in Central Asia, known officially as the Republic of Kazakhstan.

Serologic tests in which a known quantity of antigen is added to the serum prior to the addition of a red cell suspension. Reaction result is expressed as the smallest amount of antigen which causes complete inhibition of hemagglutination.

Disciplines concerned with the interrelationships of individuals in a social environment including social organizations and institutions. Includes Sociology and Anthropology.

All of the divisions of the natural sciences dealing with the various aspects of the phenomena of life and vital processes. The concept includes anatomy and physiology, biochemistry and biophysics, and the biology of animals, plants, and microorganisms. It should be differentiated from BIOLOGY, one of its subdivisions, concerned specifically with the origin and life processes of living organisms.